Clock



FIG. 1 is a top and right front perspective view of a clock showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a right side elevational view, the left side elevational view being a mirror image;

FIG. 4 is a top plan view thereof.

The cords of FIGS. 1 through 3 are shown broken away to indicate indeterminate length. 

The ornamental design for a clock, as shown and described. 